Vansco VMM3120, User Manual

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74 VMM3120
Glossary
attenuation
A gradual decrease in a current's intensity. Such a decrease may occur naturally,
or intentionally through the use of an attenuator.
CAN bus
See controller area network (CAN) bus .
CAN high
The positive wire in a shielded twisted-pair cable, which, when connected with a
CAN low, provides a complete CAN differential signal.
CAN low
The negative wire in a shielded twisted-pair cable, which, when connected with a
CAN high, provides a complete CAN differential signal.
CAN shield
The shielding that wraps around the CAN high and CAN low wires in a shielded
twisted-pair cable.
CMOS
See Complementary Metal-Oxide Semi-Conductor .
controller area network (CAN) bus
A communications network bus that permits data from sensors and other
equipment within a motor vehicle to communicate with each other and, through
telltales and other diagnostic tools, with the operator.
controller I/O board
A development product that allows users to test products on a bench in a
development environment before installing the product on a vehicle.
controller module
Any module that has embedded software used for controlling input and output
functions.
current feedback
A circuit that allows software to measure the amount of current provided by the
outputs. This circuit is typically connected to an analog input that is connected to
the microprocessor. Also known as current sense or current sensing.
current feedback control
Varying the duty cycle of an output so that the output provides a desired amount
of current to the load.